Generates numeric identifiers.
Iterator which will generate combids using a thread-local RNG.
Iterator which will generate identifiers based in the current time.
Generates a Combid (Combined Identifier), a combination of a timestamp and some random bits. The timestamp ensures they are ordered chronologically, and the random bits ensure that each ID is unique, even if thousands of people are creating IDs at the same time.
Generates an identifier based in the current time.